When Brett Higgins gets into trouble, she takes no prisoners. Usually.

But when Brett's longsuffering live-in lover Allie catches her cheating with not just one woman, but two, Brett has more than a little oopsie to make up for.

She'll do anything to appease Allie, but never dreams that Allie will ask for a price higher than any she might have imagined: that Brett make contact with her own family.

The family she was born to, the family that tore Brett apart physically, emotionally and mentally, is dying off, one by one, and not always from natural causes. Allie, desperate for proof that Brett is capable of caring about anything besides her own desires, wants Brett to find out who did what, and then do something about it. Faced with the reality that if she fails Allie again, it will be the last time, Brett walks into her worst nightmare. When It's All Relative, the prisoner taken could ultimately be Brett.

Therese Szymanski's 8th Motor City Thriller explores the most terrifying darkness of all: the one inside Brett Higgins.